MESON Chess Problem Database

Problem Display
PID: 15946 (8/8/8/5Q1N/8/8/2K1pR2/4kq2 w - - 0 1)

Zinoviev, Nikolai

Sp. Prize, Shakhmaty v SSSR, 1989

8/8/8/5Q1N/8/8/2K1pR2/4kq2

#2

4 + 3

2838 Fun with Chess Miniatures 1996
3713 Snap 2001
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sg3?
      • 1...Qxf2
        • 2.Qa5#
      • 1...Qh3
        • 2.Rxe2#
      • 1...Qg1
        • 2.Rxe2#
      • 1...Qh1
        • 2.Rxe2#
      • 1...Qg2!
    • 1.Qd3?
      • 1...Kxf2
        • 2.Qg3#
      • 1...Qg2
        • 2.Qxe2#
      • 1...Qh3
        • 2.Qxe2#
      • 1...Qg1
        • 2.Qxe2#
      • 1...Qh1
        • 2.Qxe2#
      • 1...Qxf2!
    • 1.Qg4?
      • 1...Kxf2
        • 2.Qg3#
      • 1...Qg2
        • 2.Qxe2#
      • 1...Qh3
        • 2.Qxe2#
      • 1...Qg1
        • 2.Qxe2#
        • 2.Qxg1#
      • 1...Qh1
        • 2.Qxe2#
      • 1...Qxf2!
    • 1.Qf3?
      • 1...Qg2
        • 2.Qxe2#
      • 1...Qh3
        • 2.Rxe2#
        • 2.Qxe2#
      • 1...Qg1
        • 2.Rxe2#
        • 2.Qxe2#
      • 1...Qh1
        • 2.Rxe2#
        • 2.Qxe2#
      • 1...Qxf2!
    • 1.Qb5?
      • 1...Qxf2
        • 2.Qb1#
      • 1...Qg2
        • 2.Qxe2#
      • 1...Qh3
        • 2.Qxe2#
      • 1...Qg1
        • 2.Qxe2#
      • 1...Qh1
        • 2.Qxe2#
      • 1...Kxf2!
  • Keys
    • 1.Qe5!
      • 1...Kxf2
        • 2.Qg3#
      • 1...Qxf2
        • 2.Qa1#
      • 1...Qg2
        • 2.Qxe2#
      • 1...Qh3
        • 2.Qxe2#
      • 1...Qg1
        • 2.Qxe2#
      • 1...Qh1
        • 2.Qxe2#

Anticipated by 119287(1987)

This anticipates 7362(1999)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Vars
        • Q(b);SBLOCK,XR(B)::QAB(C)
        • Q(b);N_GUARD::R1(B),XP(c)
      • Refutation
        • Q(b);
    • Try
      • Q(C);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(B)::QAB1(C)
        • Q(b);N_GUARD::QAR1(C),XP(c)
      • Refutation
        • Q(b);XR(B)
    • Try
      • Q(C);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(B)::QAB1(C)
        • Q(b);N_GUARD::QAR1(C),XP(c)
      • Refutation
        • Q(b);XR(B)
    • Try
      • Q(C);
      • Vars
        • Q(b);N_GUARD::QAR1(C),XP(c)
      • Refutation
        • Q(b);XR(B)
    • Try
      • Q(C);
      • Vars
        • Q(b);SBLOCK,XR(B)::QAR(C)
        • Q(b);N_GUARD::QAR1(C),XP(c)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
  • Actual
    • Q(C);P_PINP(c)
    • Vars
      • K(a);N_SPINP(c),OGATEB,S_FLIGHT,XR(B)::QAB1(C)
      • Q(b);SBLOCK,XR(B)::QAR(C)
      • Q(b);N_GUARD::QAR1(C),XP(c)
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